package com.ikas.ai.server.common;

import com.ikas.ai.handle.JsonResult;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * 统一封装@RestController注解返回的JSON格式，可以直接使用JsonResult返回，兼容之前的String返回
 * author HXH
 */
@RestControllerAdvice
public class ResponseResultHandler implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> aClass) {
        return !methodParameter.getMethod().getReturnType().isAssignableFrom(Void.TYPE);
    }

    @Override
    public Object beforeBodyWrite(Object o, MethodParameter methodParameter, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass, ServerHttpRequest request, ServerHttpResponse response) {
        if (o instanceof JsonResult) {
            return ((JsonResult) o).toJSON();
        } else {
            return o;
        }
    }
}
